Chemistry
i figured it out, i have to multiple the concentration by 2 because of the 2 hydroxides right? and yes i do know # 4 you want to convert 0.0354 mg/mL at 1 atm to mol/L at 0.00036 atm. so : (0.0354 mg/mL) x ( 0.00036) = 1.2744 x 10^-5 mg*CO / mL then you just want to convert un...
Chemistry
determine the pH of a 0.116 M Ba(OH)2 solution at 25 degrees C. i keep getting 13.06 for this answer, but the answer is 13.37 :S what i do is i take the negative log of the concentration which is 0.9355 which is pOH. i know that pH = 14 - pOH so i get pH = 13.06 where am i goi...
Chemistry
sorry it was a typo, 11.54. but still , you are right. 5.04 / 16 = 0.315 so answer ended up being the same in the end. thank you !
Chemistry
Is this done right? White phosphorous, P4, spontaneously bursts into flame in Oxygen gas. if 6.5 g of white phosphorous reacts completely with oxygen to form 11.54g of a phosphorous oxide, what is the empirical formula of this oxide? this is what i did: total = 11.4 g , P4 = 6...
chemistry - exam practice help!!
wow, i don't know how i missed that connection before. of course, its simple. i must be getting too nervous for my test lol. Thank you so much for clearing that up for me!
chemistry - exam practice help!!
thank you! and yes the 1,045 was a typo , but how did you know that the change row in the ice table for NaF under Na+ and F- were gonna be 1.045 ? wouldn't they be x as well ? that's just the only part that messes me up. :S
chemistry - exam practice help!!
i'm not exactly sure how to do this question :/ i dont even know where to start. "Determine the equilibrium [F-] of the following solution with initial concentrations od [HF]= 1.296 M and [NaF] = 1,045 M (ka for HF is 6.6 * 10 ^ -4) options are a) 1.046 b) 0.251 c) 2....
physics
A particle starts from the origin with a velocity of 6.0 i m/s and moves in the xy plane with a constant acceleration of (-2.0i + 4.0j)m/s^2 . at he instant the particle achieves maximum positive x-coordinate, how far is it from the origin?
physics- TEST TMRW PLS HELP!
how would i do this? -----------------A-----------B-------- I<----1.5m------>l<--0.6m-->l<-0.3m->l a carpenter carries a 6kg board . the downward force he feels on his shoulder (A) is .... ? (B is where his hand is) pls help!! i have so much difficulty with t...
physics- TEST TMRW PLS HELP!
there are basically two forces acting on the object. so do i find the resultant force first and then cross that with r?
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